The preferential solvation of neutral and ionic organic species (phenol, nitroanilines, N-methylbutyramide, 1,4-dioxane, acetate and tetraalkylammonium ions) in binary solvent mixtures (aqueous CH3CN, DMSO, EtOH, 1-PrOH, CH3CON(CH3)2; CH2Cl2/Et2O; 1,4-dioxane/benzene; cyclohexane/THF) has been investigated through the analysis of the relative intensities of intermolecular 1H-NOESY cross-peaks according to Macura-Ernst theory. Observed preferential solvation is discussed in terms of the strength of individual solute-solvent interactions, hydrophobic interactions in water-rich mixtures, and microheterogeneity in the mixed medium.
PREFERENTIAL SOLVATION OF ORGANIC SPECIES IN BINARY SOLVENT MIXTURES PROBED BY INTERMOLECULAR 1H NOESY NMR SPECTROSCOPY
BAGNO, ALESSANDRO;SCORRANO, GIANFRANCO;
1999
Abstract
The preferential solvation of neutral and ionic organic species (phenol, nitroanilines, N-methylbutyramide, 1,4-dioxane, acetate and tetraalkylammonium ions) in binary solvent mixtures (aqueous CH3CN, DMSO, EtOH, 1-PrOH, CH3CON(CH3)2; CH2Cl2/Et2O; 1,4-dioxane/benzene; cyclohexane/THF) has been investigated through the analysis of the relative intensities of intermolecular 1H-NOESY cross-peaks according to Macura-Ernst theory. Observed preferential solvation is discussed in terms of the strength of individual solute-solvent interactions, hydrophobic interactions in water-rich mixtures, and microheterogeneity in the mixed medium.
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